Rihanna celebrated her 24th birthday with her British fans. One of the world’s biggest pop stars rode the Tube (better known as the subway to U.S. folks) to rehearsals for Tuesday’s BRIT Awards in London, where she is set to perform with Coldplay. As she left the station and got into her car, she stopped to hug fans who were singing “Happy Birthday.”

RiRi spent part of her special day recording music in her hotel room and laughing with friends. She was flooded with wishes from her Navy and even received a shout-out from ex-boyfriend Chris Brown. “HAPPY BIRTHDAY ROBYN!” he tweeted and she responded, “Thanks!”